Glassy
81tektite — /tek tuyt/, n. Geol. any of several kinds of small glassy bodies, in various forms, occurring in Australia and elsewhere, now believed to have been produced by the impact of meteorites on the earth s surface. [1920 25; < Gk tekt(ós) molten +… …
82Glass transition — The liquid glass transition (or glass transition for short) is the reversible transition in amorphous materials (or in amorphous regions within semicrystalline materials) from a hard and relatively brittle state into a molten or rubber like state …
83Glass transition temperature — The glass transition temperature, T g, is the temperature at which an amorphous solid, such as glass or a polymer, becomes brittle on cooling, or soft on heating. More specifically, it defines a pseudo second order phase transition in which a… …
84List of butterflies of India (Danainae) — This is a list of the butterflies of India belonging to the subfamily Danainae of the family Nymphalidae and an index to the species articles. This forms part of the full list of butterflies of India (Nymphalidae) which itself is part of the… …
85Ambassis — Taxobox name = Ambassis image caption = Ambassis nama regnum = Animalia phylum = Chordata classis = Actinopterygii ordo = Perciformes subordo = Percoidei superfamilia = Percoidea familia = Ambassidae genus = Ambassis genus authority = Cuvier,… …
86Glass — This article is about the material. For other uses, see Glass (disambiguation). Moldavite, a natural glass formed by meteorite impact, from Besednice, Bohemia …
87glaze — [glāz] vt. glazed, glazing [ME glasen < glas, GLASS] 1. to fit (windows, etc.) with glass 2. to give a hard, glossy finish or coating to; specif., a) to overlay (pottery, etc.) with a substance that gives a glassy finish when fused b) to make… …
88Volcanic rock — is an igneous rock of volcanic origin. Texture Volcanic rocks are usually fine grained or aphanitic to glassy in texture. They often contain clasts of other rocks and phenocrysts. Phenocrysts are crystals that are larger than the matrix and are… …
89Amorphous metal — Samples of amorphous metal, with millimeter scale An amorphous metal is a metallic material with a disordered atomic scale structure. In contrast to most metals, which are crystalline and therefore have a highly ordered arrangement of atoms,… …
90Tachylite — (also spelled tachylyte) is a vitreous form of basaltic volcanic glass. This glass is formed naturally by the rapid cooling of molten basalt. It is a basic type of igneous rock that is decomposable by acids and readily fusible. The color is a… …
